nginx 安装Lua扩展 使服务器更强大

一、下载luajit 2.0

http://luajit.org/download.html

二、下载nginx源代码

http://www.nginx.org/en/download.html

三、下载nginx_devel_kit

https://github.com/simpl/ngx_devel_kit/tags

四、下载lua-nginx-module

https://github.com/chaoslawful/lua-nginx-module/tags

五、先安装luajit

make & make install

六、设置环境变量：

export LUAJIT_LIB=/usr/local/lib

export LUAJIT_INC=/usr/local/include/luajit-2.0

七、安装nginx

./configure --with-http_stub_status_module --add-module=/mnt/hgfs/vmware/ngx_devel_kit-0.2.17rc2 --add-module=/mnt/hgfs/vmware/lua-nginx-module-0.7.5rc1

make -j2

make install

八、运行

报错误：

[root@localhost nginx]# sbin/nginx -v
sbin/nginx: error while loading shared libraries: libluajit-5.1.so.2: cannot open shared object file: No such file or directory

解决：

echo "/usr/local/lib" > /etc/ld.so.conf.d/usr_local_lib.conf

/sbin/ldconfig

 

测试方法：

location /hello { 
      default_type 'text/plain'; 
      content_by_lua 'ngx.say("hello, lua")'; 
}

实例：

1）图片处理

location /upload/ {
                if (-f $request_filename) {
                        rewrite ^ /$uri last;
                }
                #default_type 'text/plain';
                set $image_root /home/www/zyyproj/static/misc;
                if ($uri ~* "/upload/(([0-9a-zA-Z]+)/([\d]+)/([0-9a-zA-Z]+).(jpg|png|gif)_([\d]+x[\d]+)+:?([\d|-]+)?:?([\d|-]+)?.(jpg|png|gif))$") {
                        set $resize "$6";
                        set $rotate "$7";
                        set $trans "$8";
                        set $tarExt "$9";
                        set $resource "$image_root/upload/$2/$3/$4.$5";
                        set $target "$image_root$uri";
                }
                rewrite_by_lua '
                        function table.contains(table, element)
                                for _, value in pairs(table) do
                                        if value == element then
                                                return true
                                        end
                                end
                                return false
                        end
                        --table.contains对传入参数作处理
                        local command = "/usr/local/imagemagick/bin/convert";
                        if(ngx.var.trans == "1" or ngx.var.tarExt == "png") then
                                command = command.." -bordercolor white -border 1x1 -matte -fill none -fuzz 20% -draw \'matte 0,0 floodfill\' -shave 1x1";
                        end
                        if(ngx.var.resize ~= "") then
                                command = command.." -resize "..ngx.var.resize;
                        end
                        if(ngx.var.rotate ~= "") then
                                command = command.." -rotate "..ngx.var.rotate;
                        end
                        command = command.." "..ngx.var.resource.." "..ngx.var.target;
                        os.execute(command);
                        --ngx.req.set_uri($request_filename, true);
                        --ngx.say(command)
                ';
                #content_by_lua  '
                #
                #';
        }